Seeing CPU usage in Android 9 without rooting?

[dvo]

TakoStats can only show overall CPU usage (not per app/process). Moreover, it requires a further app: Shizuku, which in turn requires root or ADB magic.
So much better to use 'top' via ADB.
Setting up wireless ADB is a little awkward but has the advantage that no USB connection to some other machine is needed.

 

[amn87]

TakoStats can only show overall CPU usage (not per app/process). Moreover, it requires a further app: Shizuku, which in turn requires root or ADB magic.
So much better to use 'top' via ADB.
Setting up wireless ADB is a little awkward but has the advantage that no USB connection to some other machine is needed.

Wireless ADB permission gets reset after every reboot though. Also TakoStats (and Cool Tools although it requires root) offer the ability to show the app using the most CPU at any given moment in an overlay which has been quite helpful in my case to keep an eye on misbehaving processes and if reqd. terminate. The former in addition also shows GPU usage uniquely plus the frames being spit out by the GPU. Top in Termux is awkward to use as the processes list gets cut out in portrait mode.